Factory For Ultra White Glass Windows - Sapphire Optical Windows – LZY
Factory For Ultra White Glass Windows - Sapphire Optical Windows – LZY Detail:
Uncoated sapphire has excellent surface hardness, and the range of transmittance extends from ultraviolet to mid-infrared wavelength region. Sapphire can only be scratched by a few substances other than it. The uncoated substrate is chemically inert and insoluble in water, common acids or alkalis at temperatures up to about 1000°C. Our sapphire window is a z-axis section, so the c-axis of the crystal is parallel to the optical axis, eliminating the birefringence effect of transmitted light.
Specification
Dimension Tolerance: 0.0/-0.1mm
Thickness Tolerance: ±0.1mm
Clear Aperture: ≥90%
Surface Quality: 40/20(Dimension≤50.8mm) 60/40(Dimension>50.8mm)
Flatness: λ/4@633nm
Parallelism: ≤1′
Chamfer: 0.2×45°
Sapphire Protective Windows
Shape Forming Method
CNC or laser
Product Characteristics

Material Properties
Sapphire is a single crystal aluminum oxide (Al2O3). It is one of the hardest materials. Sapphire has good transmission characteristics over the visible, and near IR spectrum. It exhibits high mechanical strength, chemical resistance, thermal conductivity and thermal stability. It is often used as window materials in specific field such as space technology where scratch or high temperature resistance is required.
| Molecular Formula | Al2O3 |
| Density | 3.95-4.1 g/cm3 |
| Crystal Structure | Hexagonal Lattice |
| Crystal Structure | a =4.758Å , c =12.991Å |
| Number of molecules in unit cell | 2 |
| Mohs Hardness | 9 |
| Melting point | 2050 ℃ |
| Boiling Point | 3500 ℃ |
| Thermal Expansion | 5.8×10-6 /K |
| Specific Heat | 0.418 W.s/g/k |
| Thermal Conductivity | 25.12 W/m/k (@ 100℃) |
| Refractive Index | no =1.768 ne =1.760 |
| dn/dt | 13×10 -6 /K(@633nm) |
| Transmittance | T≈80% (0.3~5μm) |
| Dielectric Constant | 11.5(∥c), 9.3(⊥c) |
Transmission Curve of Sapphire Optical Window

Product detail pictures:
Related Product Guide:
We retain bettering and perfecting our merchandise and service. At the same time, we do the job actively to do research and improvement for Factory For Ultra White Glass Windows - Sapphire Optical Windows – LZY , The product will supply to all over the world, such as: Orlando, Ethiopia, Liberia, We are your reliable partner in the international markets of our products. We focus on providing service for our clients as a key element in strengthening our long-term relationships. The continual availability of high grade products in combination with our excellent pre- and after-sales service ensures strong competitiveness in an increasingly globalized market. We are willing to cooperate with business friends from at home and abroad, to create a great future. Welcome to Visit our factory. Looking forward to have win-win cooperation with you.
The sales manager is very patient, we communicated about three days before we decided to cooperate, finally, we are very satisfied with this cooperation!




